#include <stdio.h>
#include <math.h>
int main()
{
	float a,b,c,d;
	double x1,x2;
	a=5;
	b=17;
	c=11;
	d=b*b-4*a*c;
	x1=(-b+sqrt(d))/(2*a);
	x2=(-b-sqrt(d))/(2*a);
	printf("x1=%f,x2=%f\n",x1,x2);
	return 0;
}
